How Big can a 5.2 get?

Ok, back to this....
I have the EQ heads from hughes, new cam and lifters, the block will be bored soon but I still havent decided what to do, to stroke or not to stroke :D
If we look this at the cam point of view, would my cam be enough for 390 cubes?? Hughes Engines I ordered the cam for stock stroke but now Im having second thoughts...